what the hell is a nug i keep hearin people say it but i dunno what it means. im good on most other words its just this one i got trouble with.
1 Improper use of contact lenses or steroid eyedrops can lead to fungal infections, which in turn can cause corneal ulcers. Also, a corneal injury that results in plant material getting into the eye can lead to fungal keratitis.  Acanthamoeba are microscopic, single-celled amoeba that can cause human infection.
Scraping the Ulcer. If your doctor spots an ulcer on your cornea, he or she will further investigate to find out what caused it. Your doctor may determine the cause by numbing your eye with eye drops, then gently scraping the ulcer to obtain a sample of it.He will test the sample to find out if it contains bacteria, fungi, or a virus.t the front of the eye is a clear layer of tissue called the cornea. The cornea is the window of your eye and permits light to enter the eye. Tears constitute the natural defense against bacteria, viruses, or fungi for the cornea.